<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script>
		// map 图键名可以是任意类型
		var m = new Map([["name","mumu"],["age",18],[{eye:2},"好眼睛"]]);
		console.log(m);
		// set添加  get获取 size大小 delete删除, clear清空
		console.log(m.get("name"))
		m.set(null,"没有");
		console.log(m);
		m.delete("age");
		console.log(m);		
		
		</script>
	</body>
</html>
